| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of part items of a valve system and constitute the valve system in compact by making it possible to support a first rocker arm and a second rocker arm corresponding to an exhaust valve and a suction valve respectively on a rocker arm common to each other in the valve system of an engine. SOLUTION: Both of the side walls of a base end section comprising each of the base end of the first and second rocker arms 70 and 71, the cross sections of which are formed into a U shape piled inner ward and outward are rockably supported on a common rocker shaft 69.
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